CVE-2023-37905 — ckeditor-wordcount-plugin is an open source WordCount Plugin for CKEditor

ckeditor-wordcount-plugin is an open source WordCount Plugin for CKEditor. It has been discovered that the `ckeditor-wordcount-plugin` plugin for CKEditor4 is susceptible to cross-site scripting when switching to the source code mode. This issue has been addressed in version 1.17

01What is this vulnerability?

ckeditor-wordcount-plugin is an open source WordCount Plugin for CKEditor. It has been discovered that the `ckeditor-wordcount-plugin` plugin for CKEditor4 is susceptible to cross-site scripting when switching to the source code mode. This issue has been addressed in version 1.17.12 of the `ckeditor-wordcount-plugin` plugin and users are advised to upgrade. There are no known workarounds for this…

02Affected products

Vendor	Product	Versions
w8tcha	CKEditor	WordCount-Plugin — < 1.17.12
typo3	cms	rte-ckeditor — >= 10.0.0, < 10.4.39, >= 11.0.0, < 11.5.30

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-07-21T19:35:49.656Z
• Last modified: 2024-10-21T13:07:15.669Z

09References

• github.com — https://github.com/w8tcha/CKEditor-WordCount-Plugin/security/advisories/GHSA-q9w…
• github.com — https://github.com/w8tcha/CKEditor-WordCount-Plugin/commit/0f03b3e5b7c1409998a13…
• github.com — https://github.com/w8tcha/CKEditor-WordCount-Plugin/commit/a4b154bdf35b346532013…
• github.com — https://github.com/TYPO3/typo3/security/advisories/GHSA-m8fw-p3cr-6jqc
• typo3.org — https://typo3.org/security/advisory/typo3-core-sa-2023-004